CN112693618B - Energy storage-bearing integrated bionic common wing rib and manufacturing method thereof - Google Patents
Energy storage-bearing integrated bionic common wing rib and manufacturing method thereof Download PDFInfo
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- CN112693618B CN112693618B CN202011599521.5A CN202011599521A CN112693618B CN 112693618 B CN112693618 B CN 112693618B CN 202011599521 A CN202011599521 A CN 202011599521A CN 112693618 B CN112693618 B CN 112693618B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 25
- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000003860 storage Methods 0.000 claims abstract description 48
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 239000000178 monomer Substances 0.000 claims abstract description 22
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 239000008151 electrolyte solution Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 239000002243 precursor Substances 0.000 claims description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 10
- 239000004917 carbon fiber Substances 0.000 claims description 10
- 239000007773 negative electrode material Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 239000010405 anode material Substances 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000013543 active substance Substances 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000007774 positive electrode material Substances 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 239000007772 electrode material Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/24—Aircraft characterised by the type or position of power plants using steam or spring force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/16—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like specially adapted for mounting power plant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0085—Immobilising or gelification of electrolyte
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to the field of airplane structure design, bionic structures and storage batteries, and provides an energy storage-bearing integrated bionic common wing rib and a manufacturing method thereof, wherein the wing rib specifically comprises the following steps: the storage battery module comprises a storage battery block (1) formed by arranging storage battery monomers (4) and a solid electrolyte (5) containing a fiber support body according to a shell layer structure, wherein the storage battery block (1) is prepared into a non-main bearing assembly of a wing in shape, and an insulating coating (2) is coated on the outer surface of the storage battery block (1); each storage battery monomer (4) is conducted in series and parallel by the aid of the sprayed conducting circuit (3), and an electric signal is output to the electronic equipment through the sprayed conducting circuit (3). The storage battery unit and the single body have certain mechanical properties, and the single body of the storage battery is arranged according to the high-strength shell laminated structure to form the wing non-main bearing wing rib, so that the storage battery has an energy storage function and can meet the bearing requirements of actual use.
Description
Technical Field
The invention belongs to the field of airplane structure design, bionic structures and storage batteries, and particularly relates to a method for designing an energy storage-bearing integrated multifunctional common wing rib based on a high-strength bionic structure.
Background
For electrically propelled aircraft or multi-powered aircraft, a large number of battery blocks are arranged inside the aircraft, occupying a large amount of available space on the aircraft. Because the aircraft has a large demand for energy, the demand for the storage battery is also large, so that the weight of the storage battery has a large proportion of the total weight of the aircraft. At present, many scholars at home and abroad aim at developing multifunctional airplane components in order to lighten the structure of an airplane. However, the research of integrating the energy storage and the aircraft components is still in the initial development stage. Design methods have been developed to integrate energy storage with the wings of small solar drones and the skin of aircrafts, but because of the thinner energy storage layer, the aircraft components that store energy can provide less energy supply. Meanwhile, the energy storage layer in the energy storage aircraft component bears less load, so that the structural design of the energy storage layer capable of bearing is not considered.
Disclosure of Invention
Object of the Invention
The bionic common wing rib integrating energy storage and bearing and the manufacturing method thereof are provided, and a multifunctional wing non-main bearing assembly capable of bearing and storing energy is designed, so that the weight of a system can be effectively reduced, the internal space of the system is saved, the space utilization rate is increased, and the light structure is realized.
Technical scheme
An energy storage-bearing integrated bionic common wing rib,
the storage battery module 1 is formed by arranging storage battery monomers 4 and solid electrolyte 5 containing a fiber support body according to a shell laminated structure, the shape of the storage battery module 1 is prepared into a non-main bearing assembly of a wing, and the outer surface of the storage battery module 1 is coated with an insulating coating 2; each battery cell 4 is conducted in series and parallel by the sprayed conductive circuit 3, and outputs an electrical signal to the electronic device through the sprayed conductive circuit 3.
The battery cell 4 is assembled by each battery cell in a sandwich structure.
The battery unit includes: a positive electrode 6 using carbon fibers as a base material and a current collector, a negative electrode 7, and a solid electrolyte 5 containing a fiber support.
The non-main load bearing assembly of wing includes: a common rib.
The fiber support includes: glass fibers, epoxy fibers, ceramic fibers.
The insulating coating 2 is, for example, an insulating silicone rubber.
The conductive circuit 3 is formed by spraying conductive silver paste on the rib structure.
A manufacturing method of an energy storage-bearing integrated bionic common wing rib comprises the following steps:
loading active substances on a carbon fiber cloth substrate/current collector material by adopting a soaking method to obtain a positive electrode material and a negative electrode material of the storage battery, and mixing a non-conductive fiber support body into a precursor electrolyte solution of a solid electrolyte;
placing a negative electrode material at the bottom of a die of a battery monomer, pouring a precursor electrolyte solution containing a fiber support body, and curing after the electrolyte solution is immersed in the negative electrode material; when the electrolyte is not completely solidified, putting the anode material, pouring the precursor electrolyte solution again, and solidifying after the electrolyte solution is completely immersed in the anode material; after the solidification is finished, the mould is removed, and a battery monomer consisting of a positive electrode, a solid electrolyte containing a fiber substrate material and a negative electrode in a sandwich structure is obtained;
arranging the battery monomers according to a shell layer structure by utilizing a common rib mold prepared at the early stage, placing the battery monomers into the common rib mold, pouring a precursor electrolyte solution mixed with a solid electrolyte of a non-conductive fiber support body into the common rib mold, and then curing and demolding to obtain a storage battery block in the shape of a common rib;
spraying conductive silver adhesive to the positions of the wing rib structure needing to be conductive to form conductive circuits, so that series-connected and parallel-connected circuits are formed among the storage battery monomers, and effective electric signals are output;
and coating an insulating coating on the outer surface of the wing rib.
Advantageous effects
The invention integrally designs the energy storage battery and the non-main bearing component of the wing, such as a common wing rib, can effectively improve the space utilization rate of the airplane and reduce the structural weight of the airplane, thereby realizing the light structure of the airplane. Secondly, the single battery adopts carbon fibers as a substrate material and a current collector of the electrode material of the storage battery, and simultaneously adopts a solid electrolyte containing a fiber support body as an electrolyte and a diaphragm, so that the mechanical property of a storage battery unit and the mechanical property of the single battery can be improved; meanwhile, when the multifunctional common wing rib is designed, a high-strength bionic structure is introduced, and the single bodies of the storage battery are arranged according to the shell layer structure, so that the mechanical property of the multifunctional common wing rib can be effectively improved.
The wing non-main bearing wing rib provided by the invention starts from two functions of energy storage and bearing of a common wing rib, not only are units and single bodies of the storage battery have certain mechanical properties, but also the single bodies of the storage battery are distributed according to a high-strength shell laminated structure to form the wing non-main bearing wing rib, so that the wing non-main bearing wing rib has an energy storage function and can meet the bearing requirement of actual use.
Drawings
FIG. 1 is a schematic view of an energy storage-bearing integrated bionic common rib of the invention.
Figure 2 is a cross-sectional view of a multi-functional conventional rib according to the present invention.
Fig. 3 is a schematic view of the arrangement of the battery cells inside the multifunctional common rib according to the present invention.
Fig. 4 is an assembly view of each unit of the secondary battery according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
An energy storage-bearing integrated bionic common wing rib comprises a storage battery monomer 4, a solid electrolyte 5 containing a fiber support body, and a storage battery block 1 formed by arranging according to a high-strength shell laminated structure, wherein the shape of the storage battery block can be prepared into a wing non-main bearing component, such as a common wing rib; the outer surface of a storage battery block 1 in the shape of a common rib is coated with an insulating coating 2; each storage battery monomer 4 is conducted in series and parallel by the aid of the sprayed conducting circuit 3, and electric signals are output to electronic equipment through the sprayed conducting circuit 3; the battery cell 4 is assembled by sandwiching each cell (a positive electrode 6 and a negative electrode 7 each of which is made of a high-strength carbon fiber as a base material and a current collector, and a solid electrolyte 5 containing a fiber support).
The wing rib has an energy storage function and a certain bearing capacity. The storage battery block 1 is a layered composite structure formed by arranging the storage battery monomer 4 and the solid electrolyte 5 containing the fiber support body based on a high-strength shell layered structure, and has good mechanical properties.
The solid electrolyte 5 containing the fiber support body selects non-conductive fibers as support body materials, such as glass fibers, epoxy resin fibers, ceramic fibers and the like; at the same time, the solid electrolyte 5 also has the function of a separator in the battery cell and the battery block.
The insulating coating 2 is selected to be a flexible insulating coating that avoids deformation damage, such as insulating silicone rubber.
The storage battery monomer 4 is a battery monomer layered composite structure formed by arranging high-strength carbon fibers as an electrode substrate material and a positive electrode 6 and a negative electrode 7 of a current collector and a solid electrolyte 5 containing a fiber support body in a sandwich structure, and has a certain bearing capacity.
The anode 6 and the cathode 7 adopt a soaking method to prepare electrode materials by taking high-strength carbon fibers as substrate materials and a current collector, so that the electrode materials have certain mechanical properties, and the damage resistance of the electrode materials is improved; meanwhile, the specific surface area of the carbon fiber is large, so that the loading capacity of active substances of the anode material and the cathode material can be improved.
And the conductive silver paste is sprayed on the wing rib structure to serve as the conductive circuit 3, so that the complexity of the structure can be reduced, and the normal use of the battery can be ensured.
A manufacturing method of an energy storage-bearing integrated bionic common wing rib comprises a storage battery block 1, an insulating coating 2 coated on the outer surface of the storage battery block, and a conductive circuit 3. Firstly, an active substance is loaded on a carbon fiber cloth substrate/current collector material by adopting a soaking method to obtain a positive electrode 6 and a negative electrode 7 material of the storage battery, and a non-conductive fiber support body is mixed into a precursor electrolyte solution of the solid electrolyte 5. Secondly, placing the negative electrode material 7 at the bottom of the single battery mould, pouring a precursor electrolyte solution containing a fiber support body, and solidifying after the electrolyte solution is immersed in the negative electrode material 7; when the electrolyte is not completely solidified, putting the anode material 6, pouring the precursor electrolyte solution again, and solidifying after the electrolyte solution is completely immersed in the anode material 6; after the curing is completed, the mold is removed, and a battery cell 4 composed of a positive electrode 6, a solid electrolyte 5 containing a fibrous base material, and a negative electrode 7 in a sandwich structure is obtained (see fig. 4). Next, using a common rib mold prepared in the previous stage, arranging the battery cells 4 in accordance with a shell layer structure, placing the battery cells in the common rib mold, pouring a precursor electrolyte solution of a solid electrolyte 5 mixed with a non-conductive fiber support into the common rib mold, and then performing curing and demolding to obtain a storage battery block 1 having a common rib shape (see fig. 2 and 3). Conductive silver paste is sprayed to the positions of the rib structure needing to be conductive to form conductive circuits 3, so that series-connection and parallel-connection circuits are formed among the storage battery monomers 4, and effective electric signals are output (see fig. 1). Finally, because other components of the aircraft wing are made of metal materials, in order to ensure that the energy storage-bearing integrated bionic common wing rib is insulated from the outside, the outer surface of the wing rib is coated with an insulating coating. When the multifunctional common wing rib is arranged in a wing for use, the multifunctional common wing rib can be used as an energy storage component to provide electric energy, has a certain bearing capacity, meets the use requirements of mechanical properties of the common wing rib, and achieves the purposes of reducing the weight of a system, saving the internal space of the system, increasing the space utilization rate and realizing the light structure.
Claims (7)
1. An energy storage-bearing integrated bionic common wing rib is characterized in that,
the storage battery module comprises a storage battery block (1) formed by arranging storage battery monomers (4) and a solid electrolyte (5) containing a fiber support body according to a shell layer structure, wherein the storage battery block (1) is prepared into a non-main bearing assembly of a wing in shape, and an insulating coating (2) is coated on the outer surface of the storage battery block (1); each storage battery monomer (4) is conducted in series and parallel by the aid of the sprayed conducting circuit (3), and an electric signal is output to the electronic equipment through the sprayed conducting circuit (3); the storage battery monomer (4) is assembled by each battery unit in a sandwich structure.
2. An energy storage-carrying integrated bionic common wing rib as claimed in claim 1,
the battery unit includes: a positive electrode (6) and a negative electrode (7) each of which comprises a carbon fiber as a base material and a current collector, and a solid electrolyte (5) comprising a fiber support.
3. An energy storage-carrying integrated bionic common wing rib according to claim 1,
the non-main load bearing assembly of wing includes: a common rib.
4. An energy storage-carrying integrated bionic common wing rib as claimed in claim 2,
the fiber support includes: glass fibers, epoxy fibers, ceramic fibers.
5. An energy storage-carrying integrated bionic common wing rib according to claim 1,
the insulating coating (2) is insulating silicon rubber.
6. An energy storage-carrying integrated bionic common wing rib as claimed in claim 1,
the conductive circuit (3) is formed by spraying conductive silver paste on the rib structure.
7. A manufacturing method of an energy storage-bearing integrated bionic common wing rib is characterized by comprising the following steps:
loading active substances on the carbon fiber cloth substrate/current collector material by adopting a soaking method to obtain a positive electrode material and a negative electrode material of the storage battery, and mixing the non-conductive fiber support body into a precursor electrolyte solution of the solid electrolyte;
placing a negative electrode material at the bottom of a die of a battery monomer, pouring a precursor electrolyte solution containing a fiber support body, and curing after the electrolyte solution is immersed in the negative electrode material; when the electrolyte is not completely solidified, putting the anode material, pouring the precursor electrolyte solution again, and solidifying after the electrolyte solution is completely immersed in the anode material; after the solidification is finished, the mould is removed, and a battery monomer consisting of a positive electrode, a solid electrolyte containing a fiber substrate material and a negative electrode in a sandwich structure is obtained;
arranging the battery monomers according to a shell layer structure by utilizing a common rib mold prepared at the early stage, placing the battery monomers in the common rib mold, pouring a precursor electrolyte solution mixed with a solid electrolyte of a non-conductive fiber support into the common rib mold, and then curing and demolding to obtain a storage battery module block in the shape of a common rib;
spraying conductive silver adhesive to the positions of the wing rib structure needing to be conductive to form conductive circuits, so that series-connected and parallel-connected circuits are formed among the storage battery monomers, and effective electric signals are output;
and coating an insulating coating on the outer surface of the wing rib.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011599521.5A CN112693618B (en) | 2020-12-29 | 2020-12-29 | Energy storage-bearing integrated bionic common wing rib and manufacturing method thereof |
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| CN202011599521.5A CN112693618B (en) | 2020-12-29 | 2020-12-29 | Energy storage-bearing integrated bionic common wing rib and manufacturing method thereof |
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| CN112693618A CN112693618A (en) | 2021-04-23 |
| CN112693618B true CN112693618B (en) | 2023-03-14 |
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| EP2418713A1 (en) * | 2000-03-31 | 2012-02-15 | Sony Corporation | Separator, gelated electrolyte, non-aqueous electrolyte, electrode and non-aqueous electrolyte cell empolying the same |
| CN101587954A (en) * | 2008-06-11 | 2009-11-25 | 晟茂（青岛）能源替代产品研发有限公司 | Novel flexible thin-film battery and manufacturing method thereof |
| CN101728572B (en) * | 2008-10-31 | 2012-07-04 | 比亚迪股份有限公司 | Battery and manufacturing method thereof |
| US8967529B1 (en) * | 2011-03-25 | 2015-03-03 | Odyssian Technology, Llc | Battery-structure |
| CN103332290B (en) * | 2013-05-28 | 2015-08-12 | 北京航空航天大学 | A kind of wing structure-solar cell integral module and method of production thereof |
| DE102015121107A1 (en) * | 2015-12-03 | 2017-06-08 | Airbus Defence and Space GmbH | Electrical energy storage device |
| CN106340683B (en) * | 2016-09-06 | 2018-12-18 | 北京理工大学 | A kind of carrying based on aluminum metal-energy storage integrated system |
| KR101916165B1 (en) * | 2016-10-14 | 2019-01-30 | 한국항공우주연구원 | The battery unit and unmanned aircraft airfoil for spa |
| CN107994270B (en) * | 2016-12-31 | 2024-01-30 | 江苏华富储能新技术股份有限公司 | Horizontal lead-carbon battery and preparation method thereof |
| CN107745819A (en) * | 2017-09-27 | 2018-03-02 | 重庆科创职业学院 | A kind of fixed-wing solar powered aircraft |
| DE102018204420A1 (en) * | 2018-03-22 | 2019-09-26 | Airbus Defence and Space GmbH | Battery assembly for load-bearing structural integration of batteries in a vehicle |
| CN109760819A (en) * | 2018-12-24 | 2019-05-17 | 中国兵器工业导航与控制技术研究所 | A kind of structure battery component of aircraft and aircraft |
| CN110576963B (en) * | 2019-09-19 | 2023-03-24 | 西北工业大学 | Solar unmanned aerial vehicle wing structure |
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